Assign metadata by dragging to grouped by view no longer available?

In the not too distant past (2-3 months ago) you could create a grouped by view in a document library and then assign/reassign metadata by dragging documents to a different group.  However, this function seems to have disappeared and I can’t find any mention of it on the usual SharePoint support sites (technet, uservoice).  I know others have noticed it due to responses to a blog comment I made yesterday.  Has anyone else noticed this or have any more information on whether it is gone for good? Thanks.